| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | L. W. Snuffy McCartney | Oil Operator | Jul 2015 | |
| 2 | L.C. Coon Production Co. | Oil Operator | Apr 1995 | |
| 3 | Lahoma Operating, Inc. | Oil & Gas Operator | Nov 2025 | |
| 4 | Lamar Oil & Gas, Inc. | Corpus Chrsti, TX 78413 | Oil & Gas Operator | Feb 2026 |
| 5 | Lawson Engineering, Inc. | Oil & Gas Operator | Dec 1984 | |
| 6 | Leroy W. & Charlie G. James | Gas Operator | Oct 1979 | |
| 7 | Leroy W. James | Oil & Gas Operator | Oct 1991 | |
| 8 | Loe Pipe Yard, Inc. | Oil & Gas Operator | Jan 1997 | |
| 9 | Louisiana Fuel Oil Corporation | Oil Operator | Aug 1997 | |
| 10 | Louisiana Leasing & Expl, Inc. | Oil & Gas Operator | Apr 2011 | |
| 11 | Louisiana-Hunt Petroleum Corp. | Oil & Gas Operator | Dec 1985 | |
| 12 | Lucky Lad Energy, LLC | Magnolia, TX 77353 | Oil & Gas Operator | Feb 2026 |